99 строки
3.7 KiB
C#
99 строки
3.7 KiB
C#
using System;
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using System.ComponentModel;
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using System.Windows.Input;
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namespace Xamarin.Forms
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{
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public sealed class TapGestureRecognizer : GestureRecognizer
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{
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public static readonly BindableProperty CommandProperty = BindableProperty.Create("Command", typeof(ICommand), typeof(TapGestureRecognizer), null);
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public static readonly BindableProperty CommandParameterProperty = BindableProperty.Create("CommandParameter", typeof(object), typeof(TapGestureRecognizer), null);
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public static readonly BindableProperty NumberOfTapsRequiredProperty = BindableProperty.Create("NumberOfTapsRequired", typeof(int), typeof(TapGestureRecognizer), 1);
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public TapGestureRecognizer()
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{
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}
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public ICommand Command
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{
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get { return (ICommand)GetValue(CommandProperty); }
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set { SetValue(CommandProperty, value); }
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}
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public object CommandParameter
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{
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get { return GetValue(CommandParameterProperty); }
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set { SetValue(CommandParameterProperty, value); }
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}
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public int NumberOfTapsRequired
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{
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get { return (int)GetValue(NumberOfTapsRequiredProperty); }
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set { SetValue(NumberOfTapsRequiredProperty, value); }
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}
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public event EventHandler Tapped;
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[EditorBrowsable(EditorBrowsableState.Never)]
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public void SendTapped(View sender)
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{
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ICommand cmd = Command;
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if (cmd != null && cmd.CanExecute(CommandParameter))
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cmd.Execute(CommandParameter);
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EventHandler handler = Tapped;
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if (handler != null)
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handler(sender, new TappedEventArgs(CommandParameter));
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#pragma warning disable 0618 // retain until TappedCallback removed
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Action<View, object> callback = TappedCallback;
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if (callback != null)
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callback(sender, TappedCallbackParameter);
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#pragma warning restore
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}
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#region obsolete cruft
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// call empty constructor to hack around bug in mono where compiler generates invalid IL
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[Obsolete("TapGestureRecognizer(Action<View, object> tappedCallback) is obsolete as of version 1.0.2. Please use Command instead.")]
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public TapGestureRecognizer(Action<View, object> tappedCallback) : this()
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{
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if (tappedCallback == null)
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throw new ArgumentNullException("tappedCallback");
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TappedCallback = tappedCallback;
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}
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// call empty constructor to hack around bug in mono where compiler generates invalid IL
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[Obsolete("TapGestureRecognizer(Action<View> tappedCallback) is obsolete as of version 1.0.2. Please use Command instead.")]
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public TapGestureRecognizer(Action<View> tappedCallback) : this()
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{
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if (tappedCallback == null)
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throw new ArgumentNullException("tappedCallback");
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TappedCallback = (s, o) => tappedCallback(s);
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}
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[Obsolete("TappedCallbackProperty is obsolete as of version 1.0.2. Please use Command instead.")]
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public static readonly BindableProperty TappedCallbackProperty = BindableProperty.Create("TappedCallback", typeof(Action<View, object>), typeof(TapGestureRecognizer), null);
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[Obsolete("TappedCallback is obsolete as of version 1.0.2. Please use Command instead.")]
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public Action<View, object> TappedCallback
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{
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get { return (Action<View, object>)GetValue(TappedCallbackProperty); }
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set { SetValue(TappedCallbackProperty, value); }
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}
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[Obsolete("TappedCallbackParameterProperty is obsolete as of version 1.0.2. Please use Command instead.")]
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public static readonly BindableProperty TappedCallbackParameterProperty = BindableProperty.Create("TappedCallbackParameter", typeof(object), typeof(TapGestureRecognizer), null);
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[Obsolete("TappedCallbackParameter is obsolete as of version 1.0.2. Please use Command instead.")]
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public object TappedCallbackParameter
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{
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get { return GetValue(TappedCallbackParameterProperty); }
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set { SetValue(TappedCallbackParameterProperty, value); }
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}
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#endregion
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}
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} |